Suspension adjustment device



Sept. 7,1926.

B. DOW ICK SUSPENSION ADJUSTMENT DEVICE Filed April 22, 1926 Patented Sept. 7, 1926.

M UNITED-1 STATES BENJAMIN DOWICK, or JERSEY-CITY, NEW JERSEY.

SUSPENSION ADJUSTMENTDEVICE i 7 Application filed llpril 22, 1926. Serial No; 103,793.

I This invention relates to adjustment de, vices torsuspension ropes, andparticularly to devices tor regulating the electric cords of ordinary drop lights, so as to ad ust such lights to anydesired elevation.

The principal object of my invention is to provide a simplified, inexpensive, eiticient,

sectional side elevation of detail of the device. 7 i

Fig; 5 is a general illustration,'in a re duced scale, showing the deviceas it appears when operatively secured to the eleo-,

tric lamp cord. V p The casing 1 of thedevlce, COlllPI'lSGS a back-plate 2, and a cover-plate 3. To the center of plate 2 is secured a stud .4 in the manner shown, upon wh ch is rotatably mounted a sheave-pulley 5 having a peripheral groove 6 suitable for the reception Said pulley is hollow of the lamp cord 7. l and within it islocated a coiled leaf-spring 8 having one .end,9 thereof secured to the stud 4L and its other end 10 secured to the rim of thepulley 5, whereby said spring continually tends to rotate the pulley in a clockwise direction as viewed in Fig, 1. Upon the rear side of the wall 11 of the pulley are pivoted, at 12, two ,gravity-pawls 13 which coactwith a pair of ratchet-- grooves lei formed in the stud 4t and with a pair of abutm'ents 15, which keep. them from falling tootar away, in the manner of the usual spring shade-roller action.

of speed, but-is prevented from rotating counter-clockwise by .eitherot said-pawls,

: and contrary to the action of the spring 8,

jeo

when-the rotation is:,-stopped. In the easing-plate 2 is formed a 'slot 16 through which passes the locking end 17 of a grip-plate 18, and ascrew 19 passes through a hole in plate 18 and threads into the casingplate, by which means the caslng can be see The pulley :5 may he therefore freely rotated-in, eitherdirection when turned atatair rate.

cured tolthe cord '1 in the manner SllQWl'l'lIl Fig. 4. V The casing plate 2 carries a grooved,

pin 20, a curved ridge 21, and a grooved roller 22 tormounting and guiding the-cord, as willbe hereinafter seen. An arm 23 pivoted to the plate 2 at 24 carries a roll 25 27 wound around the pivot 24 continually A loop 28 is then formed of the cord 7, which is then passed around the pulley 5 and between the pulley and the roll 25, and

then the cord is-passed over the gi1ide 1 ollei'-' 22 and outwardly from the, casing, wheretrom it extends as the lower cord-portion 7 that carries the lamp 29. By theator-esaid means of the disposition of the cord 7 ithin the casing l, .and by the. provision of the pin 20, r1dge21, and roller 22, the device is maintained in symmetrical'position rela tivelyvtothe electric suspension cord, with the upper and, lower cord-portions 7, 7

PA" ENT' OFFICE.

nov having a groovedper phery 26, and a spring- "bears upon said arm andcauses pressure of,

the roll 25 against the cord 7, when the latter, is wound around the pulley 5.

' For mounting the device in operative state, the upper cord-portion 7 a passed u-nv 'der the grooved pin 20, overthe ridge 21,,

andb-etween the plate. 2 and grip-plate .18, .where it is firmly secured with the screw 19.

and the center of the operating pulley 5 i in perfect aligmnent, thereby imparting a neat appearance to the installation. .The roll '25 holds the cord 7 to the peripheryof the pulley v5 while-the latter propels the cordas well as while its rotation is stopped by the pawls 13. If. desired, the grooved peripheryot the pulley 5 may be lined with rubber 5, to aid the fricti-onal hold of the cord against the pulley. WVhen it is desired j toplacethe lamp 29 at any elevation it is merely grasped and pulled or retracted, as the case may be, in the manner of the ordinary spring sliade-roller,and then'left at. V

the desired elevation; This pulling of the cord rotates the-pulley 5 contrary.to ithe 'force of the-spring 8 and the-retraction of the cord-causes said spring 'to :rotate the pulley backwardly, to take up the slaclr- .0 1"

the cord, and when the cord is" released the Y 'pawls 13 actto arrest the pulley andretain the lamp in the adjusted'position. As the.

lamp is elevated the loop28 is increased r11 size, and when the, lamp i ls lowered the free I loop is diminished in .extenhthe roll at improvements may be used without others; Having thus described my invention, I claim 1. A device of the class described having the combination with a suspension rope, of a pulley to receive a portion of the rope, a spring adaptedto rotate said pulley to draw the rope, means to stop the rotation of said pulley, and a free loop of'var'iable extent being formed of the rope by the-rotation of the pulley. p

2. A device or" the class described having the combination with a suspension rope, oi

- 7 apulley to receive a portion of the rope, a

spring adapted to rotate said pulley to draw the rope, means to stop the rotation of said pulley, a free loop of variable extent being formed of the rope by the rotation of the pulley, and means to press the rope against said pulley.

3. A device of the class described having the combination with a suspensionrope, of a pulley to receive a portion of the rope, a spring adapted to rotate said pulley to draw the rope, means to stop the rotation of said pulley, a free loop of variable extent being formed of the rope by the rotation of the pulley, and resilient means to press the rope" against the pulley.

4. A device of the class described having the'combination with a suspension rope, of a pulley to receive a portion of the rope, a spring adapted to rotate said pulley to draw the rope, means to stopthe rotation of said pulley, a tree loop of variable extent being formed of the rope by the rotation of the pulley, and spring pressed means to apply pressure of the rope against the pulley.

5. A device of the class described having the combination with a suspension rope, 01 a pulleyto receive a portion of the rope, a spring adapted to rotate saidpulley to draw the rope means to stop the rotation of said pulley, a tree loop of variable extent being formed of the rope by the'rotation of the pull y,,a roller, a pivoted arm carrying said roller,i and a spring actuating said arm toapply pressure of said roller upon said rope and against said pulley.

6. A device of the class described having .the combination 'witha suspension rope, of

a casing for the device, means to secured the rope tothe casing, a rotatable pulley, a portion of the rope being passed around the pulley, means to position a portion of the rope in said casing whereby the axis of said pulley is disposed in alignment with the vertical portion of the suspension rope, a spring adaptedfto rotate said pulley to draw the rope, means to stopthe rotation of said pulley, anda free loop being formed of the rope between said securing means and the pulley.-

7. A device of the class described having the combination witha suspension rope, of

a casing for the device, means to secure the rope to the casing, a rotatable pulley, av portion of the rope beingpassed aroundthe pul-" ley, means to position a portion of the rope in said casing whereby the axis of said-pulley is disposed in alignment with the ver tical portion of the suspension rope, a spring adapted to rotate said pulleyto draw the rope, means tostop the'rotation or" said pulley, a :tree loop being formed of therope between said securing means and the-pulley, and spring pressed means to apply pressure of the rope against the-pulley. 7

8. A device of the class described having the combination with asuspension rope, ofa casing for the device, means to secure the rope to the casing, a rotatable pulley, a portion of the rope being passed around thelpulley, means to position a portion of the rope in said casing whereby'the axis of said pu-lley is disposed in alignment Withthe vertical portion of the suspension rope, a spring adapted to rotate said pulley to draw the rope, means to stop the rotation of said pulley, a freeloop being formed of the rope between said securing means and the pulley, a roller, a pivoted arm carrying said roller, and a spring actuating said arm to'apply pressure of said roller upon said rope and against said pulley. I

9. A suspension device for an electric lamp cord having the combination of a casing adapted to be secured to any point of the cord, a rotatable pulley, a portion or the cord being passed around the pulley, means to position a portion of the cord in said casing whereby the axis of said pulley is disposed inalignment with the'vertical portion of the electric cord, a spring adapted to rotate said pulley to draw the cord, means to 7 stop thev rotationof said pulley, airee loop being formed of the cord between said securing means and the pulley, and spring pressed means to apply pressure of the cord against the pulley.

10. A suspension device for an electric of the electric cord, a spring adapted to roroller upon said rope and. against said pult'ate'said pulley to draw the cord, means to ley;

stop the rotation of said pulley, a free/100p In testimony whereof, I have signed my being formed of the cord between said sename to this specification this 20th .day' of curing means and the pulley, a roller, a piv- .April, 1926. i n

oted arm carrying said roller, and a spring actuating said arm to apply pressure of said V BENJAMIN DOWICK; V v 

